275 lines
13 KiB
JSON
275 lines
13 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2023-52766",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-05-21T15:19:24.238Z",
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"datePublished": "2024-05-21T15:30:50.343Z",
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"dateUpdated": "2026-08-05T09:11:18.108Z"
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},
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"cna": {
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T09:11:18.108Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ni3c: mipi-i3c-hci: Fix out of bounds access in hci_dma_irq_handler\n\nDo not loop over ring headers in hci_dma_irq_handler() that are not\nallocated and enabled in hci_dma_init(). Otherwise out of bounds access\nwill occur from rings->headers[i] access when i >= number of allocated\nring headers."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The vulnerable path is the platform driver's hard-IRQ handler (i3c_hci_irq_handler → hci_dma_irq_handler), reached when local I3C/I2C bus activity raises host-controller ring interrupts. There is no network or adjacent-link packet path into this HCI master driver.\nAC:L - On multi-ring-capable HCI hardware the interrupt mask can present bits beyond the single software-enabled ring, and a local attacker can reliably induce those IRQs via I3C/I2C client transfers; no attacker-uncontrollable race or layout precondition is required to hit the OOB once those bits are set.\nPR:L - The IRQ handler itself has no capability check, and bus traffic that raises ring interrupts is reachable through ordinary local I3C/I2C client paths (sensors, i2c-adapter users) without real init-namespace root or CAP_SYS_MODULE.\nUI:N - Once the attacker can generate the relevant bus traffic, the host controller delivers the interrupt and the handler runs with no separate victim action required.\nS:U - The OOB access and resulting MMIO/memory corruption stay inside the host kernel's I3C HCI authority and do not cross a VM, IOMMU, or sandbox boundary.\nC:H - The handler out-of-bounds-reads adjacent heap as struct hci_rh_data and then performs MMIO reads and IBI/xfer processing through those corrupted pointers, which is a high-impact disclosure/memory-corruption read primitive.\nI:H - The same corrupted rh->regs is used for rh_reg_write(), and hci_dma_xfer_done()/hci_dma_process_ibi() write through OOB-sourced pointers, yielding an arbitrary MMIO/memory write primitive exploitable for control-flow hijacking.\nA:H - Dereferencing an out-of-bounds or garbage rh in hard-IRQ context causes kernel oops/panic or persistent controller failure, which is full availability loss."
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}
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]
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}
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],
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"affected": [
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/i3c/master/mipi-i3c-hci/dma.c"
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],
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"version": "0",
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"status": "unaffected",
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"version": "5.15.140",
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"version": "6.6.3",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"version": "6.7",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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